222210210212021 has 4 divisors (see below), whose sum is σ = 222213330818700. Its totient is φ = 222207089605344.

The previous prime is 222210210212009. The next prime is 222210210212069. The reversal of 222210210212021 is 120212012012222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95012099182225 + 127198111029796 = 9747415^2 + 11278214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222210210212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222210210211984 and 222210210212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222210210212521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560196526 + ... + 1560338943.

It is an arithmetic number, because the mean of its divisors is an integer number (55553332704675).

Almost surely, 2^{222210210212021} is an apocalyptic number.

It is an amenable number.

222210210212021 is a deficient number, since it is larger than the sum of its proper divisors (3120606679).

222210210212021 is an equidigital number, since it uses as much as digits as its factorization.

222210210212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120606678.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222210210212021 its reverse (120212012012222), we get a palindrome (342422222224243).

The spelling of 222210210212021 in words is "two hundred twenty-two trillion, two hundred ten billion, two hundred ten million, two hundred twelve thousand, twenty-one".